WO2007095814A1

WO2007095814A1 - A method and system for obtaining the session capability of the session participant in the multi-party communication system

Info

Publication number: WO2007095814A1
Application number: PCT/CN2006/003502
Authority: WO
Inventors: Long Luo
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-02-24
Filing date: 2006-12-20
Publication date: 2007-08-30
Also published as: CN101026812A; CN101026812B

Abstract

A method and system for obtaining the session capability of the session participant in the multi-party communication system. The method mainly includes: in a multi-party communication system, a calling user sends a session establishment request to the called user via the session server and the called user returns the negotiation result carrying its session capability to the session server; the session server notifies other session participants of the obtained session capability information of the session participant according to the preset policy. The system mainly includes the session server and the session participant. Using the method and system, the session participant can obtain the session capability information of the other participants according the notification message sent by the session server.

Description

Method and system for obtaining session participation user session capability in multi-party communication system

TECHNICAL FIELD The present invention relates to the field of network communications, and more particularly to a method and system for obtaining session participation user session capabilities in a multi-party communication system. BACKGROUND OF THE INVENTION With the development of broadband networks, mobile communications will not be limited to traditional voice communication services, and multimedia services combining multiple media types such as audio, video, pictures and text will gradually be developed. The multimedia service can be combined with presence (presentation service), short message, WEB (web) browsing, location information, PUSH (push service) and file sharing to provide users with a variety of business services. The various business services mainly include - messaging services: instant messaging and chat rooms, multimedia short messages, and the like. '

Video business: entertainment, multimedia information, daily communication, etc.

E-commerce: product catalogs, search engines, shopping carts, order management, payments, etc.

Games: Single player games, group games, etc.

Positioning business: tracing people, guides, alarms, etc.

Personal Assistant: Address Book, Calendar, Bookmark Management, File Storage, Event Reminder, Email, etc. Driven by the above-mentioned various business service applications, the 3GPP (Third Generation Partnership Project), the third-generation partner organization program, has introduced an IP-based IMS (Internet Protocol Multimedia Subsystem) architecture. A standardized open architecture is used in the communication network to implement a variety of multimedia applications, providing users with more choices and richer feelings.

With the development of network technology, multi-party communication services will gradually become popular. The current multi-party multimedia communication systems include PoC (cellular-based push-to-talk) systems and conference (multimedia conferencing) systems. The PoC system is a centralized multi-party multimedia communication system.

In order to achieve multi-party communication, it is necessary to have a unified control point to manage the system and ensure the consistency and real-time management. For example, when a user requests to send audio data, the system needs to have a unique control point to process the user application.

In a multi-party multimedia communication system, there are cases where user session capabilities are not equal. For example, the calling user initiates a session establishment request to the called user through the session server, and the session establishment request requires the user to have A, B, C For the session capability, the called user needs to establish a connection with the calling party and negotiate according to the requirements of the calling user. When there are multiple called users, the session capabilities between the called users may be different.

A method for establishing a communication session in a multimedia communication system in the prior art is: in an existing cluster system or a PoC system, only media (right to voice) is managed, so if the called user cannot If the voice capability is provided, the session establishment between the calling user and the called user fails.

In the method, the session establishment process is as follows: The calling user first sends a session establishment request to the called user through the session server, and carries the required session capability in the session establishment request.

The called user negotiates according to the requirements of the calling user and the session capability of the user terminal, and sends the negotiation result to the session server. After the session server receives the negotiation result sent by the first called user, the negotiation result is notified to the calling user, and the calling user sends data to all called users according to the negotiation result;

Alternatively, the session server directly determines the negotiation result according to the requirements of the calling user, and sends data to all called users according to the negotiation result. The process of the session establishment in the above-mentioned prior art multi-party communication system is as follows. The disadvantage of the method for establishing a communication session in the prior art as described above is that the calling user does not know the session capability information of other called users, for example, Know the type of media used by other users who joined the session.

When the method is applied to an existing cluster system or a PoC system, if the called user cannot provide voice capability, the session establishment fails. Therefore, this approach increases the likelihood of session establishment failure.

Even after the session is successfully established, because the session capability information of other users who subsequently join the session is not known, the session resources negotiated in the session cannot be well used.

In this method, it is also unreasonable to establish a conference according to the negotiation result of the first called user, because other called users may have different conversation capabilities with the first called user. It is also unreasonable to always establish a session according to the requirements of the calling user, because the calling user does not know whether other called users have the session ability required by the calling user. Summary of the invention

An object of the embodiments of the present invention is to provide a method and system for obtaining a session participation user session capability in a multi-party communication system, so that the session participation user obtains session capabilities of other sessions participating users according to messages sent by the session server.

An embodiment of the present invention provides a method for obtaining a session participation user session capability in a multi-party communication system, including - In the multi-party communication system, the calling user sends a session establishment request to the called user through the session server, and the called user returns a negotiation result carrying the session capability information to the session server;

The session server notifies the other session participation users of the session participation capability information of the obtained session participation user according to a preset policy.

An embodiment of the present invention provides a system for obtaining a session participation user session capability in a multi-party communication system, including:

a session server: used to obtain and save session capability information of the session participant user; during the session establishment process or after the session establishment process, the saved session part or all other session participation users are sent to the session participation user according to a preset policy. Session ability information;

Session participation user: used to receive session capability information of some or all other sessions of the session server during the session establishment process or after the session establishment process.

As can be seen from the technical solutions provided by the foregoing embodiments of the present invention, the embodiments of the present invention send a subscription message to the session server through the session participation session, and the session server returns a notification message to the session participation user; or, the session server actively sends the notification message to the session. The participating user sends a message, so that the session participating user can obtain the session capability information of the other session participating in the session saved by the session server. The session participation user can perform subsequent session adjustment operations according to the obtained session participation capability information of other sessions. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a process of session establishment in a multi-party communication system of the prior art;

2 is a flowchart of a specific process of the method according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of obtaining, by the calling user, session performance information of each called user according to a message sent by the session server according to an embodiment of the present invention;

4 is a schematic diagram of a calling user obtaining session capability information of each called user by sending a subscription message to the session server according to an embodiment of the present invention;

FIG. 5 is a structural diagram of a system for obtaining a session participation user session capability in a multi-party communication system according to an embodiment of the present invention. The embodiments of the present invention provide a method and system for obtaining a session participation user session capability in a multi-party communication system. The main technical features of the embodiment of the present invention are: Send it The session capability information of the called user carried in the negotiation result is saved. After the session establishment process or the session establishment process, the session participation user is notified by the session participation user, so that the session participation user obtains other session participation users saved by the session server. Session ability information.

The method of the embodiment of the present invention is described in detail below with reference to the accompanying drawings. The specific processing procedure of the method in the embodiment of the present invention is as shown in FIG. 2, and includes the following steps:

Step 2-1: The calling user sends a session establishment request to the called user through the session server, and the called user returns a negotiation result carrying the session capability to the conference server. ·

In a multi-party multimedia communication system such as a PoC or a conference, a SIP (Session Initiation Protocol) protocol is generally run between a calling user, a session server, and a called user.

The calling user first sends a session establishment request to the session server, and carries the required session capability in the session establishment request. The above session capabilities include: session description, timing description, media type, and format description. The media type and format description includes the transport protocol, port number, and other media parameters. For example, the required session capability can be capability A (audio, audio), V (video, video), T (text, text), etc., and the session server forwards the received session establishment request to each called user.

After receiving the session establishment request forwarded by the session server, the called user negotiates according to the request of the calling user, the session capability of the user terminal, or the will of the user terminal, and returns the carrying session capability (such as A, T) to the session server. The result of the negotiation of information. The called user can deliver the negotiation result by sending a 200 OK message of the SIP protocol to the session server. The negotiation results returned by multiple called users may not all be the same. For example, one called user can feedback support A and V; the other called user feedback supports A, T, and so on.

After receiving the negotiation result sent by the first called user, the session server saves the session capability information of the called user carried in the negotiation result, and then, according to the negotiation result of the first responded user, Call the user to answer;

Alternatively, after receiving the negotiation result sent by the first called user, the session server saves the session capability information of the called user carried in the negotiation result, and responds to the calling user according to the request of the calling user. , that is, sending data information such as A, V, T to the calling user;

Alternatively, after receiving the negotiation result sent by one or more called users, the session server saves the session capability information of the called user carried in each negotiation result, and the session server receives some or all of the called users. After the negotiation result, the result is generated according to the policy of the conference or according to the setting of the operator, and then the caller is responded according to the generated result. After the negotiation result received by the session policy or the operator's settings, the generated result can be the largest set of negotiation results: that is, all the negotiation results. The union of; can be the minimum set of negotiation results: that is, the intersection of all the negotiation results; can be a subset of the negotiation results - that is, some session capabilities are eliminated through the strategy or configuration.

'The above-mentioned session participation users include the calling user and the called user.

Step 2-2. The session server sends the session capability information of the other part or all the sessions to the session participating user according to the preset policy.

After the session server saves the session capability information of each session participant user, after the session establishment process or the session establishment process, the session server notifies the session capability information of the saved part or all of the session participation to the user according to a preset policy. The session participates in the user.

The foregoing preset policy may be: the session server notifies the other session participation users of all the session capability information of the part of the session participation user; or the session server notifies the other session participation information of the session participation capability of the other session participation user to the other session. Participating in the user; or, the session server notifying the other session participating users of the partial session capability information of the part of the session participating user.

For example, the session server directly sends the session capability information of the other part or all sessions to the user participating in the session. The session server can send a 200 OK message of the SIP protocol carrying the session capability information of the called user to the calling user. After receiving the above message sent by the session server, the calling user obtains the session capability information of each called user. For example, users 2, 3, and 4 receive A, T, and users 5, 6, and 7 receive Α, V, Τ, and so on.

The process flow of the above-mentioned calling user obtaining the session capability information of each called user according to the message sent by the session server is shown in FIG. 3 .

For example, the session participant user may also send a subscription session state message to the session server during the session establishment process or after the session establishment process. After receiving the subscription session state message, the session server returns to the session participant user to carry other parts saved or A notification message that all sessions participate in the session capability information of the user. The subscription message can be implemented via the SIP subscription message. The notification message can also be implemented by the SIP protocol Notify message. That is, the called user can also obtain session capability information of other or all of the called users by sending a subscription message to the session server.

The process flow of the above-mentioned calling user obtaining the session capability information of each called user by sending a subscription message to the session server is as shown in FIG. 4 .

After the session participant obtains the session capability information of the other part or all of the session participants, the subsequent session adjustment operation may be performed. For example, the session participates in the session data that the user supports the session data to support the session, for example, sends V data to some called users, and sends A and T data to some called users; or The session participation user initiates a renegotiation process in the session through the session server, and adds or cancels part of the session capability. Alternatively, the session participation user preferentially transmits multiple types of media transmission rights to each other session participation user through the session server. Level management.

The above multi-party communication system includes: a PoC (Cellular Push-to-Talk) system or a Conference (Multimedia Conference) system. When the session member described in the embodiment of the present invention accesses a session through multiple servers, the session server is a centralized control server in multi-party communication, for example, in a PoC system, a PoC server that performs a control function. (PoC Server Performing Controlling PoC Function).

The schematic diagram of the structure of the system for obtaining the session participation user session capability in the multi-party communication system in the embodiment of the present invention is as shown in FIG. 5, and includes the following devices:

The session server is configured to obtain and save the session capability information of the session participant user according to the received session establishment request sent by the calling user and/or the negotiation result sent by the called user; during the session establishment process or the session establishment process, Sending the saved session part or all other session participation user's session ability information to the session participating user according to a preset policy. The session server includes: a session capability information saving module, a session capability information sending module, and a session capability information subscription processing module.

The session capability information saving module is configured to obtain and save the session capability information of the session participating user according to the received session establishment request sent by the calling user and/or the negotiation result sent by the called user.

The session capability information sending module is configured to: after the session establishment process or the session establishment process, send the saved session part or all other session participation user session capability information to the session participating user according to the received subscription message; or directly Sending the saved session part or all other session participation user's session ability information to the session participating user.

The session capability information subscription processing module is configured to receive and save session capability information subscription information sent by the session participant user, and deliver the session capability information subscription information to the session capability information storage module and the session capability information sending module.

Session participation user: used to receive session capability information of some or all other sessions participating in the session server by sending a subscription message to the session server during the session establishment process or the session establishment process; or directly receiving the part sent by the session server Or all other sessions participate in the user's session ability information.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

Rights request

A method for obtaining a session participation user session capability in a multi-party communication system, comprising: in a multi-party communication system, a calling user sends a session establishment request to a called user through a session server, the called user Returning a negotiation result carrying the session capability information to the session server;

The session server obtains the session capability information of the session participating user to be notified to other session participating users according to a preset policy.

The method according to claim 1, wherein the sending, by the calling user, the session establishment request to the called user by using the session server includes:

The calling user sends a session establishment request to the session server, and the session establishment request carries the required session capability information and the session capability information of the calling user, and the session server forwards the received session establishment request to each called user. The obtained session ability information of the calling user is saved.

The method according to claim 1, wherein the returned result of the called user carrying the session capability information to the session server comprises: - the each called user receives the session handed over by the session server After the request is established, the negotiation is performed according to the session capability required by the calling user and the session capability of the user terminal, and the negotiation result carrying the session capability information is returned to the session server.

The method according to claim 1, wherein the session capability information comprises a session description and/or a timing description and/or a media type and a format description.

The method according to claim 1, 2, 3 or 4, wherein the session server notifies the session participation capability information of the obtained session participation user to other session participation users according to a preset policy. After receiving the negotiation result returned by the called user, the session server saves the session capability information of the called user carried in the negotiation result, and responds to the calling user;

During the session establishment process or the session establishment process, the session server notifies the other session participation users of the session capability information of the saved part or all of the session participation users according to a preset policy.

The method according to claim 5, wherein the session server notifying the session participant capability information of the saved part or all of the session participation user to the other session participation user according to the preset policy specifically includes:

After the session establishment process or the session establishment process, the session participation user subscribes to the session capability information to the session server. After the successful subscription, the session server sends some or all of the other to the session participation user that sends the subscription message. Participate in session capability information of the session user; or,

During the session establishment process or the session establishment process, the session server directly sends some or all other sessions to the session participation user to participate in the session capability information of the user.

The method according to claim 5, wherein the method further comprises:

After the session participation user obtains the session capability information of the other session participation user, the subsequent session adjustment operation is performed.

The method according to claim 7, wherein the adjusting operation of the subsequent session comprises: the session participating user sending session data supported by the user to send session data to other session participating users; or

The session participating user initiates a renegotiation process in the session through the session server, and adds or cancels part of the session capability;

Or,

The session participates in the priority management of the multi-type media transmission right of the user participating in the user through the session server.

The method according to claim 5, wherein the responding to the calling user by the session server specifically includes: after the session server receives the negotiation result returned by the first called user Responding to the calling user according to the negotiation result of the first responded user;

Or,

After receiving the negotiation result returned by the first called user, the session server responds to the calling user according to the request of the calling user;

Or,

After receiving the negotiation result of some or all of the called users, the session server generates a result according to the received negotiation result according to the policy of the session or according to the setting of the operator, and responds to the calling user according to the result. .

10. The method according to claim 5, wherein the session participation user comprises: a calling user and/or a called user.

A system for obtaining a session participation user session capability in a multi-party communication system, comprising: a session server: used to obtain and save information about the activity of the session participant user; during the session establishment process or the session establishment process Afterwards, the saved part or all of the saved is sent to the session participating user according to a preset policy. Other session participation user's session ability information;

The system according to claim 11, wherein the session server specifically includes: a session capability information saving module: configured to send a session establishment request sent by the calling user and/or sent by the called user. The result of the negotiation is obtained, and the session capability information of the session participating user is obtained and saved;

The session capability information sending module is configured to send the session capability information of the saved part or all other session participation users to the session participating user according to the received subscription message during the session establishment process or the session establishment process; or directly participate in the session participation The user sends the saved part or all other sessions to participate in the user's session ability information. -

The system according to claim 12, wherein the session server further comprises: a session capability information subscription processing module: configured to receive and save session capability information subscription information sent by the session participant user, and to use the session capability The information subscription information is delivered to the session capability information saving module and the session capability information sending module.